Please create an account to participate in the Slashdot moderation system

 



Forgot your password?
typodupeerror
×
Data Storage Power

Tesla Wants To Make Every Home a Distributed Power Plant (techcrunch.com) 155

Tesla CEO Elon Musk wants to turn every home into a distributed power plant that would generate, store and even deliver energy back into the electricity grid, all using the company's products. TechCrunch reports: While the company has been selling solar and energy storage products for years, a new company policy to only sell solar coupled with the energy storage products, along with Musk's comments Monday, reveal a strategy that aims to scale these businesses by appealing to utilities. "This is a prosperous future both for Tesla and for the utilities," he said. "If this is not done, the utilities will fail to serve their customers. They won't be able to do it," Musk said during an investor call, noting the rolling blackouts in California last summer and the more recent grid failure in Texas as evidence that grid reliability has become a bigger concern.

Last week, the company changed its website to prevent customers from only buying solar or its Powerwall energy storage product and instead required purchasing a system. Musk later announced the move in a tweet, stating "solar power will feed exclusively to Powerwall" and that "Powerwall will interface only between utility meter and house main breaker panel, enabling super simple install and seamless whole house backup during utility dropouts." Musk's pitch is that the grid would need more power lines, more power plants and larger substations to fully decarbonize using renewables plus storage. Distributed residential systems -- of course using Tesla products -- would provide a better path, in Musk's view. His claim has been backed up in part by recent studies from the Massachusetts Institute of Technology, which found that the U.S. can reach a zero-carbon grid by more than doubling its transmission capacity, and another from Princeton University showing that the country may need to triple its transmission systems by 2050 to reach net-zero emissions.

This discussion has been archived. No new comments can be posted.

Tesla Wants To Make Every Home a Distributed Power Plant

Comments Filter:
  • by MikeDataLink ( 536925 ) on Tuesday April 27, 2021 @07:51PM (#61322048) Homepage Journal

    A future in where every home and building is a tiny solar power plant producing excess energy is where it all comes together. Then make sure the grids are connected properly where when things like the Texas snowpacalypse happens, other areas can share their excess to keep things leveled out. Batteries either at each home or at the neighborhood level can take you through the night and storms.

    • by PPH ( 736903 ) on Tuesday April 27, 2021 @08:04PM (#61322074)

      But be prepared for the system operator to tell you "No. We don't need your power right now." When the system has excess capacity, not everyone can sell their stored power back. And if that adversely affects your ROI, welcome to the world where the adults play and have been doing so for years.

      • And if that adversely affects your ROI,

        ROI is nothing compared to the value of self-sufficiency in generating most of your own power most (or all) of the time...

        The ROI just helps make it practical for more people.

        • by Synon ( 847155 ) on Tuesday April 27, 2021 @11:48PM (#61322578) Homepage
          The vast majority of people don't give a shit about self-sufficiency, nor do the care to spend tens of thousands at a bare minimum on a system they are expected to upkeep, that's if they can even afford to do so. Power grids in most locations are cheap, reliable, and require no extra work or thought from property owners, people will choose that option without a second thought. Maybe if you live in a place with extreme weather and frequent outages that also happens to get a ton of clear skies, but that's a small percentage of the country.
          • The vast majority of people don't give a shit about self-sufficiency

            Really? Run a poll in Texas and California and get back to me on that.

            • by saloomy ( 2817221 ) on Wednesday April 28, 2021 @12:57AM (#61322708)
              California homeowner here. I can tell you I am in the middle of permitting my solar / power wall setup from Tesla. The power provided by the system is cheaper than paying for the same amount of power myself. That is power I will use. Backup batteries are an added bonus. If I have excess power, and I sell it back to the grid, it will cost lower for operators to buy my power than produce it themselves most of the time for one simple reason: transmission lines. 30% of the power used on the grid is for the grid itself. Transmission inefficiencies and transformer inefficiencies add a third of the total usable energy produces. Generation takes another third. My solar power is sold to them at a cheap rate, close to their users. Of course they would prefer we produce the power and they transmit it a short difference, and make up any deficit with their more-expensive solution.

              Even if I went completely disconnected, it still pays for itself in under a decade, and performance is warranted for 25 years. It really is a no-brainer. Even if you finance it, it still is worth it because of the lack of your own power bill, never mind anyone else's compensation.
              • If they have targets for "green energy" (from regenerable sources), then power you provide from a solar system will help them in that regard too.
                (Europe has this "green electricity" thing, I get every year a letter detailing the consumption percentage by source of electricity - wind, hydro, nuclear, ...).

              • by tlhIngan ( 30335 )

                If I have excess power, and I sell it back to the grid, it will cost lower for operators to buy my power than produce it themselves most of the time for one simple reason: transmission lines. 30% of the power used on the grid is for the grid itself. Transmission inefficiencies and transformer inefficiencies add a third of the total usable energy produces. Generation takes another third.

                Citation needed. Transmission is considered inefficient when it consumes 10%, nevermind 33%.

                In fact, according to this, Cal

            • by misnohmer ( 1636461 ) on Wednesday April 28, 2021 @03:21AM (#61322952)

              Ok, in the very same survey, ask how many of those people already have a solar+battery system, or have already put a deposit on order and installing soon. California rolling blackouts have been going on for years, Tesla has been selling their powerwall for few years, you must think most Californians already have a Tesla solar+battery installed, right?

              A backup generator is much cheaper than the Tesla solar setup. Tesla setup for 20KW solar with storage, well over $100K, natural gas/LP 20KW generator with automatic transfer box, $5K at Costco. Installation and maintenance is extra on both setups, with solar costing more too. I went through that exercise few yeas back. At the time I was big Tesla fan, (I still have 2 Model S today) but still couldn't justify the cost, so installed a generator, runs great a few times a year I need it. Funny thing, switching both of our cars to Tesla and a rare 8 hr power outage was what motivated me to put in the generator. I can run the whole house and charge both EV's up overnight (slower charging than usual, but sufficient for overnight charging). Yea, all computerized electronics at the house need to be on a UPS (generator kicks in after 30 seconds), but that's still much cheaper than a full Tesla solar+battery setup.

              PS> Given Elon's statement that their setup HAS TO go between the grid and the house, I'd need 48KW setup to match the current utility service.

              • Thank you for the detail. I can see that Elons vision to take the planet green, is happening about as quickly as a Model S Plaid in every garage. Not exactly your Model T price tag.

                And of course the critics will claim that your $5K Costco setup won't generate power back, but it takes a long damn time to make up for a $100K+ premium. That's 30 years of $300/month electric bills. Considering the investment power of $100K over 30 years, it kind of seems like an insane waste of money if all you're looking f

              • Thanks, I thought I was the only one who knew just how crazy expensive a real solar+battery install was. I ended up buying a pair of 2KW gens costco had on sale for 350ea. One for pool pumps, one for furnace. Even 5K was more than I wanted to blow for a once every 10 year event. I hate yes hate what happened, but understand just what a deal utility power is. I also think the utilities would quickly catch on. As an example, Austin Energy now buys all power from my panels and sells me back the power at a pro
            • by stabiesoft ( 733417 ) on Wednesday April 28, 2021 @08:49AM (#61323558) Homepage
              I live in TX. Do you know precisely how many people I know that are actually going to DO something? ZERO? I am the only one buying a generator as a backup. It is one of the reasons I really really really want to legislate a week where the legislator, governors mansion and city council chambers get no heat for a week every Feb. To REMIND them about this. Keep in mind this exact same thing happened around 2002, 2011 and now 2021. Heck the 2011 freeze even had recommendations to do something which because of costs everyone skipped. Nope, you can be sure no one will do anything because costs will be higher. Based on my looking into it, way more. Solar panels work out because they are still subsidized AND the power company has to buy the power back. I have panels and was not happy when they switched from net metering to a straight 9.5c/KWH. Imagine if I got wholesale price of around 3c/KWH. I put in panels in 2005 thinking they would stick with net metering and they would pay for themselves eventually. They will not.
      • by ColaMan ( 37550 )

        "No. We don't need your power right now."

        And when they're begging for power, you can set your sell price too, right?

        • Well, in markets it is currently like that, but automatically.

          Like in my case I get hour by hour variable price for both bought and sold electricity based on the market price that hour.

          The price has never been negative value so far, but that has happened a few times in Germany when there is a windy, warm weekend day.

          • by Skinkie ( 815924 )
            You may be interested in the Dutch GOPACS [gopacs.eu] effort. It is a marketplace for infrastructure owners, creators and users of energy to commit on producing or selling in the short term. The financial incentive is the infrastructure owner pays "the difference" for the act of balancing.
        • Nice fantasy. Nope. Price to purchase from super small power suppliers like homes will be fixed and less than market value.

          • Well, not in my case at least.

            I get the same price as everyone else in the system big or small and it is variable based on the need with the price changing on hourly basis.

      • That's fine, that's what storage is for.

        And if you're making it out of used EV batteries, then the costs are quite reasonable.

        Then you sell the stored power when they actually do need it, and preserve your ROI.

        Not to mention, if we have a bunch of excess cheap power available at some particular time, then someone will come up with an industry which consumes it, enabled by that cheap power. There are a number of industrial processes which can run intermittently.

      • But be prepared for the system operator to tell you "No. We don't need your power right now." When the system has excess capacity, not everyone can sell their stored power back. And if that adversely affects your ROI, welcome to the world where the adults play and have been doing so for years.

        Not only that, but the system operator will need a way to disconnect / reconnect multiple solar units at once in order to manage the grid. Lots of little power source putting a MW or 2 into the grid will be a pain to try to manage. I can see where ISO's may simply leave them disconnected except when there is a need for power beyond what is available from generating stations, so even if a location is using less than it is capable of generating it will either charge the battery or need to reduce its output.

    • Re: (Score:3, Insightful)

      Distributed power plants are less efficient (compare a coal smokestack to the equivalent tailpipes.

      The Grid has real issues transmitting power sufficiently far without loss. This loss can be overcome more easily by a few massive generators than numerous peer-to-peer generators.

      In the snowpacalypse we saw a bunch of independent entities (power plants) all fail for the same underlying cause. It's not clear that numerous identical solar panels wouldn't succeed and fail at the same time.

      The problem with the s

      • So, in your second paragraph you say that the problem is that the grid cannot efficiently distribute power. In your last paragraph you say that the only Texas community to not lose power was the one connected to the US grid. Skipping the fact that you have no idea that there are three grids in the US, you contradicted yourself.
        • Point two is that you need to have the huge power plants' output to overcome huge transmission losses. Think a Tesla coil powered off a wall outlet vs. 1,000 tesla coils powered off AA batteries.

          Point four was that the Texas communities attached to the US grids (yes, I left off the "s") did well. There were multiple communities (and they were on the eastern and western grids) that did well. The point is there are other solutions that actually work to increase reliability.

          • Describing a 5% loss [eia.gov] as "huge" seems an exaggeration to me.

            • 5% is if the power is supplied by giant power plants. That's the point. It starts going up dramatically on a peer-to-peer grid.
      • It's not clear that numerous identical solar panels wouldn't succeed and fail at the same time.

        Maybe they could use some kind of battery on the wall...a powerwall, maybe, to store generated power for later.

        • If that was the case, there wouldn't need to be a grid. The point of the grid is to allow transmission of spot power.

          But local battery storage is pretty inefficient compared to centralized storage.

          • If your home is more efficient, you save money and/or make money from retransmission. If the grid is more efficient, power companies gain profit. It's not always bad on a practical level to do things less efficiently.

            • Re: (Score:3, Informative)

              If solar roofs become super popular, you're not going to make money from retransmission. In some places in Australia, just having retransmission turned on is a net cost (negative income) because they don't want solar when you can produce it.

              The scales of efficiency are different enough it make sense to outsource the generation/storage to centralized location, even if they make a profit.

              • It's not just about them making a profit, it's about you not paying more. If you have solar stored in a battery, you can use it during peak periods or for localized outages.

                Retransmission is something that should be able to be remotely requested. Set a bid and then if the demand reaches your set price, they can tell your device to start pushing power out. Spot power while adjusting base load generation is probably the only thing that would be profitable to you personally. But you would see no savings if

                • It's not just about them making a profit, it's about you not paying more

                  That's my point. It's cheaper to have a communal energy storage system and have everyone pay their share (plus extra so they can profit) than for everyone to have a powerwall. Plus you can do things like move from batteries to pumpng water uphill

                  The grid doesn't work on point-to-point bids like that. Power generators click on or off on a scale of days, not minutes.

            • Honest question: is centralized storage more efficient? I didn't think we had larhe scale practical storage for electricity nailed down, excluding hydro. Isn't large scale storage just more batteries?
              • I was only accepting this as fact for the sake of argument, but I can't say for sure. I'd expect that large scale would only be as efficient if it was simply more batteries. Having it distributed might actually make it more efficient because it can be localized to where the need is.

      • Most home solar systems won't feed back into the grid when grid power fails. This is done deliberately to prevent safety issues when repairs have to be done on grid equipment.

        • Yes, firstly you could kill a person. But second, your system is going to fry itself if it tries. The load presented to your little inverter would fry it.
      • Distributed power plants are less efficient (compare a coal smokestack to the equivalent tailpipes.

        Not all power plants are created equally. A solar power system's efficiency does not depend at all on its size. As such, your objection does not apply at all to solar power.

        The Grid has real issues transmitting power sufficiently far without loss. This loss can be overcome more easily by a few massive generators than numerous peer-to-peer generators.

        That is not how this works. AT ALL. Grid load is reduced by small-scale, point-of-use generation. However much power you produce locally is removed from the amount of power that has to be transmitted across the grid. Also, however much power the grid can carry in one direction, it can carry that much power in the other direction as well.

        • Go take a look at your transformer. I think you are going to be shocked at the number printed on it. 50KW peak, for your whole neighborhood LMAO. How big is your neighborhood? 4 houses? This is the problem with most on this discussion. People have no idea of the numbers involved.
          • People have no idea of the numbers involved.

            I said right in my comment that I made up the number for convenience. If you don't read comments, you're going to make irrelevant responses to them at best.

            The numbers are irrelevant to the theory of operation, which is why I didn't put any thought into what they should actually be.

            The fact that you focused on an irrelevance instead of making a meaningful response suggests that you know your argument is nonsensical.

            • The fact that you think numbers are irrelevant is my point. Thanks for making it yet again. Numbers matter.
              • The numbers do not matter to the point being made.

                When you learn to read, go back and look at the comment in question.

          • How big is your neighborhood? 4 houses

            Eight off the local transformer. Which is why Seattle trying to switch from gas to electric heat is going to be a shit-show. Enjoy watching hundreds of miles of underground service lines being dug up and replaced.

            • Ouch. Yes, numbers matter. My neighborhood pulls 6 off a 50KW, but we are all gas heated. The only upside for the heat half of the year is you can overload the transformer more when it is cold out.
              • by PPH ( 736903 )

                The only upside for the heat half of the year is you can overload the transformer more when it is cold out.

                Knowing a few people who have already made the gas to electric switch, the preferred type is most often a heat pump (we have mild winters, so high delta T inefficiency isn't an issue here). And once they get their heat pump, many will switch it over to air conditioning on one of our few hot days.

                Drive down the road where the power lines are overhead and you can already see the scorched paint jobs on the pole pigs (transformers) from running well beyond their rating.

        • A solar power system's efficiency does not depend at all on its size

          First, you assume PV solar instead of CSP solar. No one has household CSP. And that's like saying a bunch of servers spread throughout your office are more efficient than your server room (better airflow! other reasons!). Even if true, it increases maintence costs.

          Grid load is reduced by small-scale, point-of-use generation.

          You're assuming that I'm transmitting to no one (myself) or to my next door neighbor. Duh, that's efficient, bec

      • The other problem was when TX generation needed it most, the first two days, my panels were covered in snow. So while I don't know for sure, I suspect they would have produced near zero power during the peak of the crises. And then of course the last 3 days I was out, blame it on the local green utility (Austin Energy) for failing to trim trees. They *could* have taken more juice from the grid had they thought ahead and decided power lines are more important than the trees above them.
      • by Junta ( 36770 )

        Distributed power plants are less efficient (compare a coal smokestack to the equivalent tailpipes.

        This really depends on the technology. This isn't so true for solar, but is for wind and fossil fuels. Though one could make the argument repairing a centralized solar plant after a hurricane might be more feasible than repairing a bunch of rooftop solar, though that much residential damage would not be merely a matter of energy generation..

    • When the snowpacalypse happens and you have a full battery, you flip the main breaker to disconnect yourself from the grid to save your own.

    • by Junta ( 36770 )

      For that to be feasible for me, Panels need to be about 30% efficient.

      I currently have my roof covered with ~20% and come up short a bit in winter and summer. This is without an electric car to charge up.

      I agree it's a nice goal, but the tech has a way to go before it can keep up with suburban residential demand. Apartments and commercial buildings are even more challenged.

  • While this article [bbc.com] discusses the numerous issues with recycling electric car batteries, as opposed to regular car batteries, the same question should be asked in this situation. What happens to all those batteries installed in houses? Once their useful life is over, how much will it cost to replace them and what happens when they're taken away? Who, if anyone, will recycle them?

    Or will they be chucked into some hole in the ground and left to rot for eons? What about all the energy involved to extract and

    • While this article [bbc.com] discusses the numerous issues with recycling electric car batteries, as opposed to regular car batteries, the same question should be asked in this situation. What happens to all those batteries installed in houses? Once their useful life is over, how much will it cost to replace them and what happens when they're taken away? Who, if anyone, will recycle them?

      Perhaps one of the founders of Tesla might step up? [reuters.com]

    • Well, lead acid batteries are already 90% recycled [illinois.edu], so I really don't see it becoming an issue.

      The real downside to this is it will be yet another aspect of home ownership where you've got a major thing in your house that is really expensive when it goes kaput. I work in the HVAC industry and most people shit a brick over the sticker shock from a new air conditioning/heat pump system. That's the farce when it comes to getting an ROI on all this "green" tech. The upfront cost is high and by the time you'v

      • Just off the top of my head I think that lead-acid batteries are far easier to recycle than Li+ cells of any type of construction.
      • by minorproblem ( 891991 ) on Wednesday April 28, 2021 @02:58AM (#61322912)

        This is the biggest problem, most people envision free energy forever and forget to allocate the savings as future investment. I am a Power System engineer and over the past 20 years have regularly been asked to give advise to friends and family with regards to installing solar systems. The biggest reoccuring cost is battery replacement systems rapidly deteriorate after a certain amount of time, and also are very sensitive to temperature. This is all fine if you make sure you put assisde a few hundred dollars each year in preparation for the replacement but a lot of people fail to do this.

        Really the best solution isn't a homeowner solution but a community implemented solution. That way they can pool resources, have a committee to manage expenditure and levy fees and organise regular inspections and maintenance.

        The biggest downside to being an engineer is realising that everything is in a constant state of decay and it requires real effort on behalf of society to keep everything running smoothly. I wish i could go back to being innocent and thinking everything was great :). On a positive note I am very certain we have the technology to improve society for the future, and if you want to go down the rabbit hole try looking into virtual inertia.

      • Only 5% of Lithium batteries are recycled now.

        https://www.bbc.com/news/busin... [bbc.com]

    • What happens to all those batteries installed in houses? Once their useful life is over, how much will it cost to replace them and what happens when they're taken away? Who, if anyone, will recycle them?

      There are battery recyclers already, including Tesla. As more batteries stack up to be recycled, it will be worth more money to go into recycling, and there will be more battery recyclers.

      Not everything is either recyclable or, more importantly, easy and cost effective to recycle. Look at the issue of getting people to recycle glass bottles and aluminum cans.

      Recycling glass bottles is stupid. We should be reusing them, like we used to. Recycling them costs just as much as making new bottles, which is why nobody wants to do it. Recycling aluminum cans makes sense, though, and it's easy to make people do it. Just charge a meaningful deposit.

    • While this article [bbc.com] discusses the numerous issues with recycling electric car batteries, as opposed to regular car batteries, the same question should be asked in this situation. What happens to all those batteries installed in houses? Once their useful life is over, how much will it cost to replace them and what happens when they're taken away? Who, if anyone, will recycle them?

      For this to make environmental sense the cost of recycling should be included in the price; with the amount put in a trust and paid out to whoever recycles them. Ideally, the batteries would be designed for recycling to keep the costs, and thus purchase price down, and the batteries actually be recyclable. I'm sure we'll see that when we see a $10K Tesla...

  • Not sure about solar/Powerwall, but ...

    If you had several million electric cars connected to the grid, their high-capacity batteries could be the ultimate grid-balancer.

    Yes, I'm aware that there are all kinds of objections that can be made to the details, but the general principle is sound, surely? Could (say) 10 million electric car batteries plugged in at any given time cover the demand for power at peak times in the US?

    • Peak power tends to be in the afternoon when most everyone has their car at work. It’s a nightmare getting just one or two electric installs in parking lots, dozens, hundreds or thousands are right out. So the short answer is no.
      • by XXongo ( 3986865 )

        Peak power tends to be in the afternoon when most everyone has their car at work.

        Which is exactly why you need storage.

      • It’s a nightmare getting just one or two electric installs in parking lots

        It was a nightmare to get sufficient charging stations to make long journeys in an EV practical. And yet it happened: automakers investing in the infrastructure drectly (Tesla) or indirectly by supporting 3rd party networks (as happened in much of Europe), or other companies seeing a potentially lucrative market. It was also a nightmare to get enough public charging points for people without a driveway... and yet that also happened, through private companies, city councils, or a combination. There was so

  • Less peak capacity required, as the network can store excess during the low load times for the high load times. In turn, less line transmission capacity required, because you're evening out the load.

    As long as I can be a selfish bastard and disconnect from the grid in a major blackout event to keep my own home going, I'm OK with it.

    And of course, it'd be nice if Musk wasn't the only player.

    • And of course, it'd be nice if Musk wasn't the only player.

      we need anticompetitive laws enforcing universal service and interchangeability. Solar and batteries in homes are great, but each company locking out all competition is not something that can be tolerated in a utility. For example, the rate a utility pays a Tesla power wall for selling back power needs to be the exact same for any competitors in the same area at the same time. Imagine if ford gas stations refused to sell gas to chevys to try and put them out of business because that’s where we are

      • For example, the rate a utility pays a Tesla power wall for selling back power needs to be the exact same for any competitors in the same area at the same time.

        Where did you get the idea that they would be different?

        • From Elon’s anticompetitive stance on electric charging. I don’t trust billionaires addicted to making as much money as possible to do the right thing. Once the anticompetitive practices start rolling it gets much harder than if the laws are in place up front.
  • For my setup, if I added a battery, I would not want to charge the battery from the solar system. Instead, the best option would be to pull electricity from the grid at night, when I get the cheapest rate and then sell back to the grid late afternoon/early evening, when rates are highest.

    • I get a flat rate 24 hrs a day, so I'd want to charge in the afternoon and use it in the early evening. Once depleted I'd never want to charge from the grid, because it would be extra wear on the batteries for no financial gain.

      This sort of setup really needs to be flexible to the needs of the household.

      • There are 3 scenarios when adding a battery makes financial sense:
        1. Extreme differences in electricity pricing at different times per day.
        2. Low feed-in tariff.
        3. Unreliable grid (depending on how much lost power costs you).

        Here, in CA, with my optimum setup, I have reason 1. At night, my rate is approximately 13c/kWh and in summer afternoons, it is over 54c/kWh. This provides an opportunity for a time-based arbitrage. Buy at night and sell back during the day (my house is grandfathered into a plan that pa

    • by ras ( 84108 )

      I would not want to charge the battery from the solar system. Instead, the best option would be to pull electricity from the grid at night

      That makes no sense, assuming you are charged something for overnight supply, even if it's a small something. Once you have solar panels, the electricity from them is effectively free.

      Right now batteries make no sense either. And I say that as an owner of a house battery. I used to be charged AUD$0.24/kWh for electricity I bought from the grid, AUD$0.15 / kWh for elect

      • You miss the lost opportunity cost of selling at the peak rate.

        My setup requires buying electricity at some times and selling back to the grid at others. I won't go into the details, but maximum arbitrage is achieved in the scenario I gave.

      • Re: (Score:3, Informative)

        by amorsen ( 7485 )

        AUD$10,000 for 6 kWh

        Prices have already fallen dramatically since then.

        https://www.itstechnologies.sh... [itstechnologies.shop]

        £892 each. Two of those, AUD$3500 (assuming 10% sales tax). Brackets and such add a little more, but on the other hand you get at least 500Wh more usable capacity (assuming the 6kWh in your system are 100% usable).

        If my example is anything to go by, they need to drop by a factor of 5.

        They have already dropped almost a factor of 3.

    • Uh huh. And you don't think electric power companies wouldn't think of this and find some way to prevent you from making a profit off them like that?
      Probably like this: everyone does as you say. Suddenly nighttime demand is as high if not higher than daytime. Power companies raise nighttime rates.
      • Uh huh. And you don't think electric power companies wouldn't think of this and find some way to prevent you from making a profit off them like that? Probably like this: everyone does as you say. Suddenly nighttime demand is as high if not higher than daytime. Power companies raise nighttime rates.

        Not only that, but no doubt will push public service commissions to set buy back rates as low as possible and to refuse to buy back.

  • by Molokov_au ( 8033448 ) on Tuesday April 27, 2021 @08:33PM (#61322166)
    In South Australia (Adelaide, specifically), we have thousands of houses already with solar, and many with batteries (some Tesla Powerwalls) which are acting as a Virtual Power Plant - in fact, that's what the program is called. Our house is on it, as we generate quite a lot of power from solar - more than we need on a daily basis - and excess solar that isn't stored in the battery goes back to the grid. Sometimes power can be taken from our battery to the grid when they have high demand. It all sounds quite good as you do get paid for this grid-pulled power, and our electricity bills have been miniscule for the last year and a half (less than A$20 a month, and we're actually about A$100 in credit due to some months when we fed in more than we used). Of course, the power companies are planning to reduce the amount we get paid for feed in to something even less than the current low rate, so this money-saving isn't likely to continue for too much longer. We also have the issue where our electricity infrastructure in Australia is so out of date (and dependent on coal and gas plants) that it can't cope when there's too many houses feeding solar power back to the grid, so they switch it off sometimes and just let the power go to waste... ( News article from March 2021: https://www.abc.net.au/news/sc... [abc.net.au] )
  • A commercially operated solar farm can leverage economies of scale with more efficient sun tracking, plant controllers and professional monitoring and maintenance.

    Current off-grid home setups are more expensive and resource intensive than grid power when you fully account for costs of panels, charge controllers, inverters, batteries and associated installation and maintenance costs.

    Decentralization to residence level does not make sense for most people.

    • One word: Texas
    • Overall efficiency might be worse, but you would care more about how the efficiency benefits yourself. If the big provider gains efficiencies, they get a bigger profit. If I am relatively inefficient but partially self-sufficient, I get the savings.

  • by 140Mandak262Jamuna ( 970587 ) on Tuesday April 27, 2021 @09:49PM (#61322372) Journal
    Tesla has already demonstrated an incredibly successful pilot program based on distributed storage in South Australia.

    The program called for 50,000 homes to be equipped with home batteries, all linked wirelessly and managed by Tesla. That project had been completed 2%, or about 1000 homes when a coal fired power plant ( Queensland’s Kogan Creek coal power station ) tripped and went off line. The load was high and the grid frequency started dropping. Such a severe disruption would have taken the grid down and large parts of the grid would be dropped (called load shedding) without notice. Operators would bring them all back on line slowly section by section costing several million dollars.

    But, like the little engine that could, that tiny 2% complete distributed "virtual" power station kicked in, kept the grid up, till additional power was brought on line and thus averted disaster.

    So do not discount or disparage the batteries. The utility scale batteries we are talking about are of the order of 350 MW x 4 hours and such like. Not minutes or seconds.

    Citation provided [teslarati.com]

    • Incredible success? Not quite. The flip side is grid problems when too much solar is generated by homeowners, grid stability [abc.net.au] requires taking them offline. It's nice to have in an emergency but distributed solar has other issues that need to be addressed. Building homes and offices designed for solar and energy efficiency is no doubt the wave of the future and will ensure systems are designed to meet homeowner/business needs effectively, but being part of the grid will require investments in grid rework t
  • Since the sun don't shine at night.
    and nights are long in winter.
    And I don't think people will be putting up their own windmills.

  • Delusions of power seem to be limiting Elon's sight a bit I think.

    I would certainly hope he understands there is no way on Earth he'll be allowed to be the sole provider of this miracle.

    He'll have to share the spoils if he wants to play the game. This means other vendors selling their own solar cells, batteries
    or entire systems.

    It should be an amusing thing to watch unfold.

    • I would certainly hope he understands there is no way on Earth he'll be allowed to be the sole provider of this miracle.

      Elon surely understands well that he's not the only game in town. On the other hand, he does have a big advantage over others due to simple name recognition.

  • Or does he envision a hulking vanadium redox battery filling up every suburban backyard?

  • I don't like the way he wants to only sell his products to compel purchasers to participate in it.

    The Tesla PowerWall is really nice, and by many counts, is the best looking and performing option for "whole house battery storage" on the market today. (I looked at a few other contenders before and last I checked, they didn't have as much capacity, among other things.)

    I don't necessarily want to buy Tesla's solar panels though, just to get a PowerWall! At my last house, I already spent a lot of money for a S

    • he's more interested in selling everyone the packages so he can ensure the whole thing will network together

      As a goal, that makes sense. But you wouldn't need a wholly integrated system for this; solar panels (including the Tesla ones) are pretty dumb; the Powerwall would be handling the smart part, and you could have pretty much any PV setup feed into that.

  • Dumb on an intergalactic scale.

    It alienates both would be buyers and vendors.

  • Nissan was touting the idea of cars acting as batteries able to supply power. Unfortunately for them they backed the wrong charging format and so the idea died on its ass. But new cars like the Ioniq 5 can also do it through type 1 & 2 charges.

    I wouldn't be surprised if this becomes quite common over time with people hooking their cars up to house and the house and car form a symbiosis based on their power consumption needs and the panels on the house.

  • [The future]

    Telsa will find that few can afford a $100K+ power setup, and his recent tactic of comes-in-a-kit-only product offering, will force him to start offering his product for "free" in order to roll it out en masse.

    Tesla will put themselves in between you and the electric company (kit mandate) while bundling it with a "Slash your bill in half TODAY!" sales gimmick. They'll start starving the electric companies out of revenue, and negotiate a fraction of what you were paying before. Then, when the T

  • Varta [varta-ag.com] and LG [lgessbattery.com] are house battery systems.
    So, basically one can't buy solar panels from Tesla and batteries from other vendors or the reverse, or am I missing something?
  • Sure, I'm fine with Tesla making my home a power plant. ...As long as they pay for it, and fix my roof if it starts leaking.

You can tell how far we have to go, when FORTRAN is the language of supercomputers. -- Steven Feiner

Working...